Monitor speakers on top of subs

[PAR]

Or how about a pair of ( genuine) monitors that have an in room response down to 20Hz:

 

https://dutchdutch.com/8c/

 

You don't give a budget but remember as these are active you don't need the expense of power amplifiers.

 

 

[PAR]

That is a great suggestion for the OP. I have just ordered multiple sets of their pucks to go under my ATC active monitors.

[PAR]

9 hours ago, AudioDoctor said:

Not as simple an implementation I would guess, but thats basically what Joseph Audio does, and these are some fantastic speakers.

 

http://www.josephaudio.com/pearl3

Exactly. Whilst appreciating Ralf11's stricture, nevertheless some of the most successful speakers on the planet consist of a small upper bass/mid/treble module seated on top of woofers/subwoofers in a separate cabinet. For example speakers from Wilson Audio, Verity, the Kii Three + BXT and too many more to name. All, AFAIK ,implement some form of decoupling between the modules. It seems that this style of speaker has to be judged to be a successful recipe if sales and number of "me too" models introduced over the past four decades since the Wilson Watt  Puppy is considered.